My plant is suddenly turning yellow and I don't know what it wrong with it or if it is normal. I have it for about 4 month and this happened only this week. I don't know if it's related, but it has been very hot in my country these days.
This is a photo from a few days ago when I asked about the identification of the plant. (Euphorbia mammillaris)
edit: The yellow parts dried and I'm worried for the others. I didn't water it at all since then and I added some sand. Should I cut the dead parts? Do you think the rest of the plant is affected?